I have a Worcester combi boiler 24 CDI. When the heating is on i get hot water, but when i have the centrakl heating off i only get hot water if i reduce the flow of water to a dribble, then i get hot water. If i turn the tap normally i only get tepid to luke warm water
does the boiler fire when you run the hot tap ? if not then service kit. if boiler fires but water doesnt get hot , feel central heating pipes at boiler if they get hot and hotter with the tap running then replace divertor valve both pig of a job to do !
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